Amazon is sending me a replacement which should get here on Monday. (I merely asked for the adaptor but I guess they're replacing the whole pump). I said I damaged it... but ok. Gotta love that company.
3 days of sump being offline should be ok I would think...

Just now. But of course, I knocked my return pump adaptor into the sump while messing around in the dark. So now return pump isn't working [emoji37]
Don't suppose anyone has one of these laying around?